Putting rigid foam on concrete walls...how to lay DriCore in this setup?

I am starting to finish my basement and I plan on putting rigid foam all long the exterior walls. I read I should seal these with tuck tape and spray foam around the edges (which I assume means top and bottom). My question is, if I plan on laying DriCore, how do I integrate it with the foam on the walls?

DriCore first and then put up the foam and seal to DriCore at bottom (or leave open and not seal)?

Foam walls first sealed to concrete floor and DriCore up to foam walls with 1/4 gap?

If anyone knows the best way, let me know.

Thanks

Bob Mariani

11-22-2009 12:57 PM

Do the walls first and seal. There are many better ways to fix the floor then dricore panels. These will simply allow the moisture to sit underneath waiting for a space to enter the flooring to deteriorate it.

w/o a moisture test, how would you know what type of floor covering/treatment would be acceptable ? ? ?

have seen too many jobs where expediency got in the way of common sense - h/o's & diy'ers relying on ' feelings ' & tv shows compared to facts,,, its your house so do what you want,,, you came looking for advice - don't take mine :no:

have a nice thanksgiving !

ctkeebler

11-29-2009 10:17 AM

Quote:

Originally Posted by ChaoticBliss
(Post 356459)

I am starting to finish my basement and I plan on putting rigid foam all long the exterior walls. I read I should seal these with tuck tape and spray foam around the edges (which I assume means top and bottom). My question is, if I plan on laying DriCore, how do I integrate it with the foam on the walls?

DriCore first and then put up the foam and seal to DriCore at bottom (or leave open and not seal)?

Foam walls first sealed to concrete floor and DriCore up to foam walls with 1/4 gap?

If anyone knows the best way, let me know.

Thanks

Were you ever able to figure out the proper way of installing the rigid foam on the walls and the dricore. If the dricore is laid first with a 1/4 gap against the foundation wall then the foam, the air gap would behind the rigid foam. I think the gap is only for expansion purposes. Then you can build the walls right on top of the dricore. According to the dricore website, you can use 2 inch screws to attach the wall to the dricore and then two 3 inch tapcons per 8 foot length.

Im trying to figure out the same answer, the above I got from the Holmes on Homes forum.

T.L.

ccarlisle

11-29-2009 10:49 AM

It's in the instructions (Figure 2.1)...foam first against the concrete, then DriCore panels up to that...

ctkeebler

11-29-2009 11:41 AM

I have read the instructions, I have read some debate over the question of putting/building the walls directly on top of the dricore.

Should the insulation be: foam board against concrete foundation, then the stud wall then the dricore up to the stud wall wall or should it be: dricore up to concrete wall, foam board over the dricore with stud wall on top of the dricore.

ccarlisle

11-29-2009 11:44 AM

Option II...you don't want to stud a wall directly onto concrete.

ctkeebler

11-29-2009 03:23 PM

Do I spray foam the seam where the rigid foam and dricore meet? Cut it like 1/4 or 1/2 short and then fill the gap with spray foam or can i cut it tight and seal the seal with some type of silicone caulk since the dricore is a floating system?

I contacted DRIcore and they told me to leave a 1/4" gap between the Rigid foam and DRIcore, then spray foam that gap. Anyone do this with good results? I think this would work but if the dricore expands and contracts will this break the sprayfoam seal?

Bob Mariani

09-12-2012 04:54 PM

That is possible but usually you spray enough to compensate for such issues. Bigger issue is the foamboard against the wall. Impossible to get enough tightness to prevent moisture being trapped behind it. You need R15 tight against the concrete to prevent this (in New England zone) Which is 2" closed cell foam.